Man from Bergen escaped (4)
I believe the answer is:
gene
'man' is the definition.
'from bergen escaped' is the wordplay.
'from' indicates a hidden word.
'GENE' is hidden within 'bergen escaped'.
(Other definitions for gene that I've seen before include "Biological factor determining heredity" , "Element of heredity" , "DNA unit" , "What makes us different" , "-- Pitney, singer" .)